Paving block and building material



I fication.

Patented Manse, 1926.

; UNITED srA GEORGE 2B. smEYxEE AND FRANK A. MANTEL rigs PATENT OFFICE.

, or MEMPHIS, TENNESSEE, nssreuons TO THE STBYKER KOT-NvWOOD PRODUCTS COMPANY, OF ME'MPHIS, TENNESSEE, A

CORPORATION OF TENNESSEE.

. PAVING BLOCK AND BUILDING MATERIAL.

The present invention relatesto artificial 1 paving blocksand building material, and

method ofp'roducing the same, and consists in the steps of procedure, and combinations and arrangements of substances hereinafter employed. The invention is disclosed by described and particularly set forth in the accompanying'claims. I I The invention has for its purpose to pro vide a novel form of paving block or. building material which can bemanufactured at small cost and which in use maybe substituted for paving blocks and buildin material of the natural .or artificial kind now Wayof illustra-tlon 1n the following: I

' Percentage I I. by volume.

A vegetable fiber, such as'ground cotton stalk Q 70 to 80 A filler, e. g., ashes-- 10 to 30 A- binder, such as pitch or as-- In combining the materials the cotton stalk or other Vegetable fiber is ground to. a comparatively fine condition and then thoroughly mixed-with the ashes. I The mix- I ing operation may be performed by manuallabor or with the usual type of machines employed for mixing paving or filling materials. The pitchor asphalt is heated to the proper consistency, i. e., anywhere from 200 degrees F. to 400 degrees F. and" at. this I 4 temperature the commingled vegetable 'fiber I and ashes are added and the whole inti- 1922. .Serial No. 558,274.

mately mixed to insure even distribution of the solid materials throughout the mass."

The mixture while still in a molten condition is poured into the desired molds and then subjected to a pressing operation.

From the foregoing it \will be clearly seen that the material thus composed will inherently have all the desirable qualities of compactness, water proof and durability; and it will be further noted. that the paving block or building material thus made is particular- 1y adapted to withstand the disadvantages usually "attendant upon materials of this ch'aracter when subjected to Varying temperature changes.

I It is obvious that those skilled in the art may depart from the elements herein recited, orin the arrangement of compounding the same, without departing from the spirit of the invention, and therefore wedo not wish to be limited to such features except as may be required by the claims. I I

Havin thus described our invention, what I is claime as newand desired to beprotected by U. S. Letters Patent, is I '1. A paving block or building mate rial comprising. in parts by volume vege- 80 per cent, ashes 10 to 20 bituminous binder tablefiber 70 ta percent, and a .per cent. substantially as set forth.

2. A method of producing an article of the class described,- consisting in mixing comminuted vegetable -fibre. in volumul'ar parts of 7 O to 80 per cent, with comminuted ashes 10' to 20 per cent, and heating 10 to 20' per cent pitch to between 200 to 400 F.,

mixing the comminuted inand intimatel gredients wit J-the pitch at this temperature. J

In testimony tures' FRANK MAN/TEL.

' GEORGE "B. STRYKER; p 

